Electricity and magnetism : an elementary text-book, theoretical and practical (1920)
Glazebrook, Richard, Sir, 1854-1935 · Cambridge : The University press · leaf 175
tswe get the time between two transits. By a complete periodis meant the time between two transits in the same direction.Multiply therefore the observed time between two transits by2 and we have T the time of a complete period. Substitute inthe formula MH=iTrIT\ we get MH. The time during which the… … 166 MAGNETISM [CH. XI If the magnet has a period of 8 or 10 seconds it willusually be sufficient to observe some twenty transits corre-sponding to a total interval of from 1| to 2 minutes. We can put this formula into another form which issometimes more convenient. Let n be the number of transits…
Electricity · Magnetism
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